72077866 has 16 divisors (see below), whose sum is σ = 123914880. Its totient is φ = 30802320.

The previous prime is 72077857. The next prime is 72077867. The reversal of 72077866 is 66877027.

It is a super-2 number, since 2×72077866² = 10390437534227912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72077867) 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, 2145 + ... + 12196.

It is an arithmetic number, because the mean of its divisors is an integer number (7744680).

Almost surely, 2^72077866 is an apocalyptic number.

72077866 is a deficient number, since it is larger than the sum of its proper divisors (51837014).

72077866 is a wasteful number, since it uses less digits than its factorization.

72077866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14709.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 72077866 is about 8489.8684324317. The cubic root of 72077866 is about 416.1666807716.

The spelling of 72077866 in words is "seventy-two million, seventy-seven thousand, eight hundred sixty-six".