761667665 has 16 divisors (see below), whose sum is σ = 1018310400. Its totient is φ = 542152320.

The previous prime is 761667661. The next prime is 761667679. The reversal of 761667665 is 566766167.

It is not a de Polignac number, because 761667665 - 2² = 761667661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (761667661) 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, 144740 + ... + 149909.

It is an arithmetic number, because the mean of its divisors is an integer number (63644400).

Almost surely, 2^761667665 is an apocalyptic number.

It is an amenable number.

761667665 is a deficient number, since it is larger than the sum of its proper divisors (256642735).

761667665 is a wasteful number, since it uses less digits than its factorization.

761667665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294712.

The product of its digits is 1905120, while the sum is 50.

The square root of 761667665 is about 27598.3272138005. The cubic root of 761667665 is about 913.2475300638.

The spelling of 761667665 in words is "seven hundred sixty-one million, six hundred sixty-seven thousand, six hundred sixty-five".