7977669 has 8 divisors (see below), whose sum is σ = 12156480. Its totient is φ = 4558656.

The previous prime is 7977653. The next prime is 7977677. The reversal of 7977669 is 9667797.

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

It is not a de Polignac number, because 7977669 - 2⁴ = 7977653 is a prime.

It is a super-2 number, since 2×7977669² = 127286405347122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7977649) 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, 189924 + ... + 189965.

It is an arithmetic number, because the mean of its divisors is an integer number (1519560).

Almost surely, 2^7977669 is an apocalyptic number.

It is an amenable number.

7977669 is a deficient number, since it is larger than the sum of its proper divisors (4178811).

7977669 is a wasteful number, since it uses less digits than its factorization.

7977669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379899.

The product of its digits is 1000188, while the sum is 51.

The square root of 7977669 is about 2824.4767657037. The cubic root of 7977669 is about 199.8137349138.

It can be divided in two parts, 7977 and 669, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 7977669 in words is "seven million, nine hundred seventy-seven thousand, six hundred sixty-nine".