1165406651 has 8 divisors (see below), whose sum is σ = 1171022784. Its totient is φ = 1159804800.

The previous prime is 1165406633. The next prime is 1165406659. The reversal of 1165406651 is 1566045611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1165406651 - 2³⁰ = 91664827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165406659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182525 + ... + 188801.

It is an arithmetic number, because the mean of its divisors is an integer number (146377848).

Almost surely, 2^1165406651 is an apocalyptic number.

1165406651 is a deficient number, since it is larger than the sum of its proper divisors (5616133).

1165406651 is an equidigital number, since it uses as much as digits as its factorization.

1165406651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1165406651 is about 34138.0528296504. The cubic root of 1165406651 is about 1052.3474768027.

The spelling of 1165406651 in words is "one billion, one hundred sixty-five million, four hundred six thousand, six hundred fifty-one".