76669649 has 16 divisors (see below), whose sum is σ = 94590720. Its totient is φ = 60688320.

The previous prime is 76669639. The next prime is 76669667. The reversal of 76669649 is 94696667.

It is not a de Polignac number, because 76669649 - 2¹² = 76665553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76669649.

It is not an unprimeable number, because it can be changed into a prime (76669639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3542 + ... + 12879.

It is an arithmetic number, because the mean of its divisors is an integer number (5911920).

Almost surely, 2^76669649 is an apocalyptic number.

It is an amenable number.

76669649 is a deficient number, since it is larger than the sum of its proper divisors (17921071).

76669649 is a wasteful number, since it uses less digits than its factorization.

76669649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16480.

The product of its digits is 2939328, while the sum is 53.

The square root of 76669649 is about 8756.1206592874. The cubic root of 76669649 is about 424.8228077957.

The spelling of 76669649 in words is "seventy-six million, six hundred sixty-nine thousand, six hundred forty-nine".