73664690 has 16 divisors (see below), whose sum is σ = 144650880. Its totient is φ = 26787120.

The previous prime is 73664687. The next prime is 73664693. The reversal of 73664690 is 9646637.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73664687) and next prime (73664693).

It is a super-2 number, since 2×73664690² = 10852973105592200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73664693) 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, 334730 + ... + 334949.

It is an arithmetic number, because the mean of its divisors is an integer number (9040680).

Almost surely, 2^73664690 is an apocalyptic number.

73664690 is a deficient number, since it is larger than the sum of its proper divisors (70986190).

73664690 is a wasteful number, since it uses less digits than its factorization.

73664690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669697.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 73664690 is about 8582.8136412251. The cubic root of 73664690 is about 419.1985661784.

The spelling of 73664690 in words is "seventy-three million, six hundred sixty-four thousand, six hundred ninety".