61670690 has 8 divisors (see below), whose sum is σ = 111007260. Its totient is φ = 24668272.

The previous prime is 61670689. The next prime is 61670711. The reversal of 61670690 is 9607616.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59459521 + 2211169 = 7711^2 + 1487^2 .

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

It is a super-2 number, since 2×61670690² = 7606548010152200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61670690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3083525 + ... + 3083544.

Almost surely, 2^61670690 is an apocalyptic number.

61670690 is a deficient number, since it is larger than the sum of its proper divisors (49336570).

61670690 is a wasteful number, since it uses less digits than its factorization.

61670690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6167076.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 61670690 is about 7853.0688268982. The cubic root of 61670690 is about 395.0871783224.

The spelling of 61670690 in words is "sixty-one million, six hundred seventy thousand, six hundred ninety".