1670660761 has 16 divisors (see below), whose sum is σ = 2084963328. Its totient is φ = 1300525200.

The previous prime is 1670660713. The next prime is 1670660809.

1670660761 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1670660713) and next prime (1670660809).

It is a cyclic number.

It is not a de Polignac number, because 1670660761 - 2⁹ = 1670660249 is a prime.

It is a super-2 number, since 2×1670660761² = 5582214756690198242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1670661761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71646 + ... + 92056.

It is an arithmetic number, because the mean of its divisors is an integer number (130310208).

Almost surely, 2^1670660761 is an apocalyptic number.

1670660761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1670660761 is a deficient number, since it is larger than the sum of its proper divisors (414302567).

1670660761 is a wasteful number, since it uses less digits than its factorization.

1670660761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21492.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 1670660761 is about 40873.7172398107. The cubic root of 1670660761 is about 1186.5774504302.

The spelling of 1670660761 in words is "one billion, six hundred seventy million, six hundred sixty thousand, seven hundred sixty-one".